I'll be as objective as i can and list games that i don't really like, but here are the top seven best and worst:

Best:

1. Metal Gear Solid 4: Guns of the Patriots
2. Legend of Zelda: Twilight Princess
3. Halo 3 (Some will disagree with the third place position, but i took points off because basically all of the good 360 exclusive games are FPS)
4. Call of Duty 4: Modern Warfare
5. Shadow of the Colossus
6. Fire Emblem
7. Castlevania: Dawn of Sorrow